Slopes and projected apnoea thresholds for rebreathing (slope-R and pAT-R, respectively) and steady-state (slope-SS and pAT-SS, respectively) in the first and second measurement of all subjects
| Slope-R measurement 1 L·min−1·kPa−1 | 12.9 (9.2–16.3) |
| Slope-R measurement 2 L·min−1·kPa−1 | 11.6 (7.0–17.2) |
| Slope-SS measurement 1 L·min−1·kPa−1 | 13.5 (8.3–17.3) |
| Slope-SS measurement 2 L·min−1·kPa−1# | 13.4 (8.4–16.9) |
| pAT-R measurement 1 kPa | 4.1 (3.8–4.8) |
| pAT-R measurement 2 kPa | 4.1 (3.6–4.5) |
| pAT-SS measurement 1 kPa | 3.9 (3.5–4.3) |
| pAT-SS measurement 2 kPa# | 3.8 (3.0–4.1) |
Data are presented as median (interquartile range). #: two subjects excluded from calculations.